LT1964
7
1964fb
Input Ripple Rejection
LT1964-BYP
Minimum Input Voltage
LT1964, LT1964-SD
Minimum Input Voltage
TEMPERATURE (°C)
60
58
56
54
52
50
48
46
44
1964 G19
RIPPLE REJECTION (dB)
V
IN
= V
OUT(NOMINAL)
– 1V +
0.5V
P-P
RIPPLE AT f = 120Hz
I
L
= –200mA
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
–3.0
–2.5
–2.0
–1.5
–1.0
–0.5
0
1964 G20
MINIMUM INPUT VOLTAGE (V)
NOTE: THE MINIMUM INPUT VOLTAGE
ACCOUNTS FOR THE OPERATING
THRESHOLD OF THE SHDN PIN WHICH
IS TIED TO THE IN PIN INTERNALLY
I
L
= –200mA
I
L
= –1mA
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
–3.0
–2.5
–2.0
–1.5
–1.0
–0.5
0
1964 G21
MINIMUM INPUT VOLTAGE (V)
I
L
= –200mA
I
L
= –1mA
–50 –25 0 25 50 75 100 125
NOTE: THE SHDN PIN THRESHOLD
MUST BE MET TO ENSURE
DEVICE OPERATION
Current Limit Current Limit Input Ripple Rejection
INPUT/OUTPUT DIFFERENTIAL (V)
0
–600
–500
–400
–300
–200
–100
0
1964 G16
–4 –8 –12 –16 –20
CURRENT LIMIT (mA)
ΔV
OUT
= 100mV
TEMPERATURE (°C)
–600
–500
–400
–300
–200
–100
0
1964 G17
CURRENT LIMIT (mA)
–50 –25 0 25 50 75 100 125
V
IN
= –7V
V
OUT
= 0V
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
1964 G18
I
L
= –200mA
V
IN
= V
OUT(NOMINAL)
– 1V +
50mV
RMS
RIPPLE
C
BYP
= 0
C
OUT
= 10μF
C
OUT
= 1μF
TYPICAL PERFORMANCE CHARACTERISTICS
